Mark Wahlberg Plans a Catholic Wedding

If Mark Wahlberg and longtime girlfriend Rhea Durham tie the knot in Southern California, don't expect his entourage to be in attendance.

"If we do it here [in L.A.], it'll probably just be us and the kids," Wahlberg, 37, told reporters at Monday's Callaway Golf Foundation Challenge at the Riviera Country Club in Pacific Palisades, Calif., benefiting the Entertainment Industry Foundation's cancer research programs.

"If we do it in Boston, I would say there'd be a lot more family members, so there'll be some fighting," he joked.

Walberg and Durham, who have three children – Ella Rae, 5, Michael, 2, and 4-month-old Brendan Joseph – haven't finalized all the wedding details but the actor says it will most likely happen in August and will "definitely [be] in a Catholic church."

And even with some sibling rivalry in the Wahlberg household, the Entourage executive producer says the family's newest addition, Brendan Joseph, is doing well and is "well behaved."